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a block of mass m 2 kg and initial velocity v 5 ms runs into and compresses a spring of spring constant k 50 nm
two wires are welded together end to end the wires are made of the same material but the diameter of one is twice that
a long horizontal hose of diameter 42 cm is connected to a faucet at the other end there is a nozzle of diameter 14 cm
a tube of radius 5 cm is connected to tube of radius 1 cm as shown above water is forced through the tube at a rate of
assume that an initially stationary gold nucleus remains motionless during a head-on collision with an 83 mev alpha
a ruby laser emits an intense pulse of light that lasts a mere 30 ns the light has a wavelength of 690 nm and each
a puck of mass 01 kg slides in a circular path on a horizontal frictionless table at an angular velocity of 20 rads it
a typical cost for electric power is 120 cents per kilowatt-hoursuppose your refrigerator uses 500 w of power when its
a 2 kg mass is attached to a spring of spring constant 20 nm at t 0 the spring is at its relaxed position and the
a high-speed flywheel in a motor is spinning at 500rpm when a power failure suddenly occurs the flywheel has mass 350kg
an electric fan is turned off and its angular velocity decreases uniformly from 490revmin to 210revmin in a time
you have available lenses of focal lengths 20 cm 40 cm 80 cm and 160 cm if you were to use any 2 of these lenses to
tritium 31 h is a heavy isotope of hydrogen with an atomic mass of 3016049 u normal hydrogen has an atomic mass of
an astronaut is in equilibrium when he is positioned 738 km from planet x and 472 km from planet y along the straight
a copper bowl of mass m1 contains a mass m2 of water both at temperature t which is below the boiling point of water a
suppose the flux through a loop changes uniformly from 12 wb to 18 wb in 650 s what is the magnitude of the emf induced
blue light of wavelength 446nm passes through a diffraction grating with a slit spacing of 15times10 3mm and makes a
a 150-g sample of aluminum specific heat 0902 j g-1 oc-1 initially at 950oc is immersed in a 350-g sample of water
a 40 kg ball is on the end of a 16 m rope which is fixed at o the ball is held at point a with the rope horizontal and
what product would you expect to be formed when propylamine reacts with aqueous sodium nitrite and hydrochloric
one possible means of achieving space flight is to place a perfectly reflecting aluminized sheet into earth s orbit and
2als 6hclaq 2alcl3aq 3h2g according to the equation above how many grams of aluminum are needed to completely react
a father pulls his children in a wagon for 25 minutes covering 125 miles on a level sidewalk he pulls with an average
a flask contains 225 g of an unknown liquid initially at 140oc after 234 kj of heat are added to the liquid its final
two capacitors are connected parallel to each other and connected to the battery with voltage 30v let c1 95 u f c2